access control model的用法和樣例：
例句
- Control model for quality forecasting.
質(zhì)量預測控制模型。 - The authorization and access request rules and constraints of spatial region access control were defined, and the method of spatial data access control was described in detail.
給出了授權和訪(fǎng)問(wèn)請求判斷的方法，建立了二維空間區域訪(fǎng)問(wèn)控制模型。
